<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>

<body>

  <div id="app">
    <input type="text" v-model="message.a">
    <hr />
    {{message.a}}
    <hr />
    id:{{count}}
    <ul>
      <li>haha</li>
    </ul>
  </div>

  <script src="./Watcher.js"></script>
  <script src="./Observer.js"></script>
  <script src="./Compile.js"></script>
  <script src="./MVVM.js"></script>

  <script>
    let vm = new MVVM({
      el: '#app',
      data: {
        message: {
          a: 'Hello world!!!'
        },
        count: 1
      }
    });
  </script>

</body>

</html>